### Please describe the problem.

Our [datalad tests started to fail](https://github.com/datalad/datalad/issues/6369) 2 days ago in [datalad/git-annex](https://github.com/datalad/git-annex/) .

one relates to the fact that git-annex, if `init` is provided with `--version=6` would auto upgrade all the way to 10, not `8` which is the "default" version of annex:

```
lena:/tmp
$> mkdir r && cd r && git init && git annex init --version=6 && git config annex.version
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint: 
hint: 	git config --global init.defaultBranch <name>
hint: 
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint: 
hint: 	git branch -m <name>
Initialized empty Git repository in /tmp/r/.git/
init  ok
(recording state in git...)
10
```

<details>
<summary>and it would stay at 8 if --version=8</summary> 

```
$> mkdir r && cd r && git init && git annex init --version=8 && git config annex.version
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint: 
hint: 	git config --global init.defaultBranch <name>
hint: 
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint: 
hint: 	git branch -m <name>
Initialized empty Git repository in /tmp/r/.git/
init  ok
(recording state in git...)
8

```
</details>


which makes it a bit odd. 

Anyways -- thought to mention this and seek feedback so either git-annex adjusts its ways or we adjust our tests to expect annex auto-upgrade any non-default version to the highest one it supports.

### What version of git-annex are you using? On what operating system?

```
$> git annex version
git-annex version: 8.20211231+git126-gf7a3c1355-1~ndall+1
build flags: Assistant Webapp Pairing Inotify DBus DesktopNotify TorrentParser MagicMime Feeds Testsuite S3 WebDAV
dependency versions: aws-0.22 bloomfilter-2.0.1.0 cryptonite-0.26 DAV-1.3.4 feed-1.3.0.1 ghc-8.8.4 http-client-0.6.4.1 persistent-sqlite-2.10.6.2 torrent-10000.1.1 uuid-1.3.13 yesod-1.6.1.0
key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 BLAKE2B256E BLAKE2B256 BLAKE2B512E BLAKE2B512 BLAKE2B160E BLAKE2B160 BLAKE2B224E BLAKE2B224 BLAKE2B384E BLAKE2B384 BLAKE2BP512E BLAKE2BP512 BLAKE2S256E BLAKE2S256 BLAKE2S160E BLAKE2S160 BLAKE2S224E BLAKE2S224 BLAKE2SP256E BLAKE2SP256 BLAKE2SP224E BLAKE2SP224 SHA1E SHA1 MD5E MD5 WORM URL X*
remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar git-lfs httpalso borg hook external
operating system: linux x86_64
supported repository versions: 8 9 10
upgrade supported from repository versions: 0 1 2 3 4 5 6 7 8 9 10
local repository version: 8
```

> [[fixed|done]] --[[Joey]]
